<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @version    $Id: Layout.php 16222 2009-06-21 19:55:20Z thomas $
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_View_Helper_Abstract.php */
require_once 'Zend/View/Helper/Abstract.php';

/**
 * View helper for retrieving layout object
 *
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_View_Helper_Layout extends Zend_View_Helper_Abstract
{
	/** @var Zend_Layout */
	protected $_layout;

	/**
	 * Get layout object
	 *
	 * @return Zend_Layout
	 */
	public function getLayout()
	{
		if (null === $this->_layout) {
			require_once 'Zend/Layout.php';
			$this->_layout = Zend_Layout::getMvcInstance();
			if (null === $this->_layout) {
				// Implicitly creates layout object
				$this->_layout = new Zend_Layout();
			}
		}

		return $this->_layout;
	}

	/**
	 * Set layout object
	 *
	 * @param  Zend_Layout $layout
	 * @return Zend_Layout_Controller_Action_Helper_Layout
	 */
	public function setLayout(Zend_Layout $layout)
	{
		$this->_layout = $layout;
		return $this;
	}

	/**
	 * Return layout object
	 *
	 * Usage: $this->layout()->setLayout('alternate');
	 *
	 * @return Zend_Layout
	 */
	public function layout()
	{
		return $this->getLayout();
	}
}
